--- gforth/Attic/mips.h 1995/10/07 17:38:17 1.4 +++ gforth/Attic/mips.h 1996/07/26 15:28:29 1.7 @@ -1,7 +1,22 @@ -/* - Copyright 1992 by the ANSI figForth Development Group +/* This is the machine-specific part for MIPS R[2346810]000 processors + + Copyright (C) 1995 Free Software Foundation, Inc. + + This file is part of Gforth. + + Gforth is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License + as published by the Free Software Foundation; either version 2 + of the License, or (at your option) any later version. - This is the machine-specific part for MIPS R[2346810]000 processors + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #if !defined(USE_TOS) && !defined(USE_NO_TOS) @@ -40,6 +55,8 @@ /* this provides the first 4 bits of a jump address, i.e. it must be <16 */ #define SEGMENT_NUM 1 +#define JUMP(addr) (J_PATTERN|((((unsigned)(addr))&JUMP_MASK)>>2)) +#define CALL(addr) (JAL_PATTERN|((((unsigned)(addr))&JUMP_MASK)>>2)) /* PFA gives the parameter field address corresponding to a cfa */ # define PFA(cfa) (((Cell *)cfa)+2) @@ -49,7 +66,7 @@ # define CODE_ADDRESS(cfa) ((Label)(((*(unsigned *)(cfa))^J_PATTERN^(SEGMENT_NUM<<26))<<2)) /* MAKE_CF creates an appropriate code field at the cfa; ca is the code address */ # define MAKE_CF(cfa,ca) ({long * _cfa = (long *)(cfa); \ - _cfa[0] = J_PATTERN|((((long)(ca))&JUMP_MASK)>>2); /* J ca */ \ + _cfa[0] = JUMP(ca); \ _cfa[1] = 0; /* nop */}) # ifdef undefined /* the following version uses JAL to make PFA1 faster */ @@ -59,22 +76,29 @@ # define CODE_ADDRESS(cfa) ((Label)(((*(unsigned *)(cfa))^JAL_PATTERN^(SEGMENT_NUM<<26))<<2)) # define MAKE_CF(cfa,ca) ({long *_cfa = (long *)(cfa); \ long _ca = (long)(ca); \ - _cfa[0] = JAL_PATTERN|(((((long)_ca)>>2))&JUMP_MASK); /* JAL ca+4 */ \ + _cfa[0] = CALL(_ca); \ _cfa[1] = 0; /* *(long *)_ca; delay slot */}) # endif /* undefined */ - /* this is the point where the does code starts if label points to the - * jump dodoes */ -# define DOES_CODE(cfa) ((Xt *)(((char *)CODE_ADDRESS(cfa))+8)) +/* this is the point where the does code starts if cfa points to a + code field of a does>-defined word */ +#define DOES_CODE(cfa) \ + ({ Xt _cfa=(Xt)(cfa); \ + Label _ca=CODE_ADDRESS(_cfa); \ + ((*(unsigned *)_cfa)&(~JUMP_MASK)) == J_PATTERN && \ + (*(unsigned *)_ca) == JUMP(symbols[DODOES]) \ + ? _ca+DOES_HANDLER_SIZE : 0; }) + + +/* this is a special version of DOES_CODE for use in dodoes */ +#define DOES_CODE1(cfa) ((Xt *)(((char *)CODE_ADDRESS(cfa))+DOES_HANDLER_SIZE)) - /* this is a special version of DOES_CODE for use in dodoes */ -# define DOES_CODE1(cfa) DOES_CODE(cfa) # define DOES_HANDLER_SIZE 8 # define MAKE_DOES_CF(cfa,does_code) \ ({long does_handlerp=((long)(does_code))-DOES_HANDLER_SIZE; \ long *_cfa = (long*)(cfa); \ - _cfa[0] = J_PATTERN|((does_handlerp&JUMP_MASK)>>2); /* J ca */ \ + _cfa[0] = JUMP(does_handlerp); \ _cfa[1] = 0; /* nop */}) /* # define MAKE_DOES_CF(cfa, does_code) ({char *does_handlerp=((char *)does_code)-DOES_HANDLER_SIZE; \ @@ -93,7 +117,7 @@ */ #define MAKE_DOESJUMP(addr) ({long * _addr = (long *)addr; \ - _addr[0] = J_PATTERN|(((((long)symbols[DODOES])>>2)+4)&JUMP_MASK), /* J dodoes+4 */ \ + _addr[0] = JUMP(((unsigned)symbols[DODOES])+4); \ _addr[1] = *(long *)symbols[DODOES]; /* delay */}) /* the following version uses JAL to make DOES_CODE1 faster */ @@ -104,7 +128,7 @@ #define DOES_CODE1(cfa) ({register Code *_does_code asm("$31"); \ _does_code; }) #define MAKE_DOESJUMP(addr) ({long * _addr = (long *)addr; \ - _addr[0] = JAL_PATTERN|(((((long)symbols[DODOES])>>2)+4)&JUMP_MASK), /* JAL dodoes+4 */ \ + _addr[0] = CALL(((long)symbols[DODOES])+4); _addr[1] = *(long *)symbols[DODOES]; /* delay */}) #endif